Irradiation dose [kj m -2 ] x10-3. Wood ESO modified wood succinic monoester. Irradiation time [h]
|
|
- Leslie Stevenson
- 5 years ago
- Views:
Transcription
1 Scientific Report regarding project implementation in the period january december 215 Project Title: Advanced researches related to the behavior of multi-component polymer systems under simulated environmental factors action Activities of the proposed objectives were accomplished and are summarized in this report. It is a well known fact that polymeric materials cover almost all of human activity domains. However, such materials possess limited durability, especially during applications which require long exploitation periods. During exposure of polymer based materials to aggressive environmental factors, of which the most significant are solar light (especially the UV component from solar light spectra) and temperature, there occur important structural modifications which lead to loss of properties (optical, mechanical, dielectric), resulting in premature product failure. That is why predicting the lifetime of organic polymeric materials in specific utilization conditions still represents a difficult to resolve complex scientific issue. bjective 1. Photochemical stabilization of multicomponent polymeric systems Photostabilization methods are generally linked to the photodegradation mechanisms. Taking into account the different mechanisms of photodegradation processes, photostabilization may be made by: 1. Screening of surfaces exposed to ultraviolet radiations. Protection is undertaken by coating the surface with some thin layers in order to stop the radiation from penetrating the polymer bulk, through the following mechanisms: - absorbtion of luminous energy with formation of active species and modification of spin multiplicity, which lose their active character by photochemical transpositions or formation of inert species; - transformation of absorbed light into vibrational energy, without modification of spin multiplicity, the dezactivation of excited states being accompanied by thermal effects; 2. Usage of energetic quenchers of excited states. Such quenchers are compounds capable to accept energy from photochemically activated molecules before initiation of photodegradation process. An efficient stabilization is reached when the energetic content of the quencher s excited state is lower than that of the photochemically activated polymer. nce the excited state is transferred from the photochemically active polymer to the photostabilizer molecule, the latter returns to its fundamental state through fluorescence, phosphorescence or heat emission. 3. Hydroperoxides decomposition. During polymers photodecomposition there occur photo-oxidative processes which result in the formation of hydroperoxidic structures. Accumulation of hydroperoxides into materials bulk containing organic polymers must not occur since these structures are highly instable and decompose through thermal or photochemical activation, leading to free radicals formation and thus to depolymerization processes via radicalic mechanism. Since there is evidence of the proportionality between the photodecomposition rate of exposed materials and concentration of free radicals accumulated in bulk, it is appreciated that decomposition of hydroperoxidic structures right after their formation through adding of sulphur or nickel based compounds may prevent free radicals accumulation in critical concentrations. 4. Caption of radicals formed during exposure and their transforming into chemical species with low reactivity represents an efficient photostabilization method. The mechanism consists in the introduction of some light sensitive compounds into the material bulk, such as hindered amines (HALS), which act through reactions with active radical species, like peroxides Choosing the adequate photostabilizer depending on the photodegradation mechanism Wood photostabilization against UV radiations by screening the surface with coating based on succinic anhydride and epoxidized soybean oil Wood, as natural composite material comprised of cellulose, lignin and hemicelluloses, is sensitive to light, due to the presence of chromophoric entities in its structure, compounds with visible light absorbant capacity which generate photo-oxidative processes, leading to ireversible structural modifications. Such modifications are accompanied by changes in optical properties, in a former phase, and significant loss of physico-mechanical properties in the end with shape modification. A efficient method of preventing wood photodegradation implies surface screening either by thin layer coating or by chemical modification. The study presented in the current report is focused on the evaluation of softwood photostability, chemically modified by succesive surface treatment with succinic anhydride (SA) and epoxidized soybean oil (ES) (Scheme 1) (Epoxy and succinic anhydride functionalized soybean oil for wood protection against
2 UV light action D.Rosu, R.Bodirlau, C. A.Teaca, L.Rosu, C. D.Varganici; J. Clean. Prod., (215); doi.org/1.116/j.jclepro ). Scheme 1. Succesive treatment of softwood with SA(1) and ES(2) The wood photo-oxidation process was investigated by monitoring structural and surface properties (colour). Chromatic coordinates values (specific to surface reddening and yellowing) increased with irradiation time and dose. Lignin exhibited a strong photodegradation tendency, leading to significant surface reddening. It was concluded that the epoxidized soybean oil coating protects wood surface against photo-oxidation reactions by a screening effect. As an exemplification, Fig. 1 shows the colour difference variation as a result of UV exposure of untreated wood sample and wood sample treated by coating with succinic anhydride and epoxidized soybean oil as a function of time and irradiation dose (Epoxy and succinic anhydride functionalized soybean oil for wood protection against UV light action D.Rosu, R.Bodirlau, C. A.Teaca, L.Rosu, C. D.Varganici; J. Clean. Prod., (215); doi.org/1.116/j.jclepro ) Irradiation dose [kj m -2 ] x1-3 Wood ES modified wood succinic monoester 15 E Fig. 1 Variation of colour difference as a function of irradiation time and dose It may be observed that colour variations measured at coated wood surface are much lower as the ones characterizing unprotected wood surface. Studies regarding colour modifications have evidenced that in the case of unprotected wood there exists a surface darkening tendency, while the surface of wood treated with succinic anhydride and epoxidized soybean oil exhibits a slight decoloration tendency. Fig. 2 shows the lightness factor variation (ΔL) with irradiation time and dose measured at wood surface before and after
3 protection. Accumulation of chromophores at irradiated samples surface is indicated by the variation of chromatic coordinates a * and b * (Fig. 3). (Epoxy and succinic anhydride functionalized soybean oil for wood protection against UV light action D.Rosu, R.Bodirlau, C. A.Teaca, L.Rosu, C. D.Varganici; J. Clean. Prod., (215); doi.org/1.116/j.jclepro ). 6 Irradiation dose [ kj m -2 ] x Wood ES modified wood succinic monoester 2 L Fig. 2 Variation of lightness factor as a function of irradiation time and dose The data shown in Fig. 3 depicts the tendency of red and yellow chromophores accumulation at unprotected wood samples surface. The protective effect of succinic anhydride and epoxidized soybean oil coating is sustained by the accumulation of a lower quantity of chromophores during irradiation. Irradiation dose [kj m -2 ]x1-3 Irradiation dose [kj m -2 ]x1-3 wood wood 18 ES modified wood succinic monoester ES modified wood succinic monoester red 12 yellow a * 9 b * 21 green 6 blue 3 (1) 14 (2) Fig. 3 Modification of chromatic coordinates with irradiation time and dose Variation of chromatic coordinates characterizing the protected wood samples is much diminuated by comparison with that of unprotected samples. Structural modifications during irradiation were monitored by FTIR technique for both unprotected and coated samples. (Epoxy and succinic anhydride functionalized
4 soybean oil for wood protection against UV light action D.Rosu, R.Bodirlau, C. A.Teaca, L.Rosu, C. D.Varganici; J. Clean. Prod., (215); doi.org/1.116/j.jclepro ). Comparative evolution of carbonilic and phenolic entities was thusly monitored, as depicted in Figs. 4 and 5. 2 Irradiation dose [kj m -2 ]x Irradiation dose [kj m -2 ]x1-3 wood ES modified wood succinic monoester 15 Carbonyl/cabohydrate ratio 1 5 wood ES modified wood succinic monoester Lignin/carbohydrate ratio Fig. 4 Modification of carbonyl group content during irradiation of unprotected and coated wood samples Fig. 5 Modification of lignin content during irradiation of unprotected and coated wood samples Research has shown that in the case of unprotected wood, the concentration of carbonyl groups increases proportionally with irradiation time, thus sustaining the idea of wood degradation through photo-oxidative processes. These processes occur throughout the entire exposure period of samples to UV irradiation. It was also demonstrated that, unlike unprotected wood, wood surface coated with succinic anhydride and epoxidized soybean oil manifests chemical inertness during photo-oxidation (Fig. 4). The ratio between surface signals in the range cm -1, corresponding to carbonil groups, and in the range cm -1, corresponding to carbohydrate structural units from cellulose, remains almost constant. Fig 5. demonstrates that the photodegradation rate of lignin (most susceptible wood component to light action from whose degradation chromophore structures result) is significantly reduced by coating with succinic anhydride and epoxidized soybean oil. ne may observe that the decrease of the ratio between lignin aromatic structural entites signal ( cm -1 ) and the one at cm -1, specific to carbohidrate units decreases much slowly in the case of protected wood Photostabilization of epoxy resins crosslinked with modified vegetable oils There were conducted photochemical stability studies concerning some epoxy networks based on bisphenol A crosslinked with modified vegetable oils. The crosslinking agent was obtained by reaction of epoxidized castor oil with maleic anhydride. The structure of the studied network is given in Scheme 2 (Novel bio based flexible epoxy resin from diglycidyl ether of bisphenol A cured with castor oil maleate; D.Rosu, F.Mustata, N.Tudorachi, V.E. Musteata, L.Rosu, C. D.Varganici; RSC Advances, 5(57), (215)). CH C CH 2 C (CH 2 ) CH CH 7 C CH CH CH C ( CH 2 ) CH CH CH ( CH CH 7 2 ) ( CH 2 ) CH CH ( CH 7 2 ) 7 CH (CH 2 ) CH 5 3 CH CH C H C CH 2 CH CH 2 C H CH 2 CH CH 2 crosslinked resin C H CH 2 CH CH 2 C CH CH C ( CH 2 ) CH CH CH ( CH 2 ) C CH C CH CH H CH C ( CH 2 ) CH CH ( CH 7 2 ) 7 C CH 2 CH CH 2 CH 2 C (CH 2 ) CH CH CH (CH 7 2 ) CH CH C CH 2 CH CH 2 C CH C CH CH C 2 CH CH 2 H H Scheme 2 Structure of epoxy resins crosslinked with modified vegetable oils
5 Preliminary studies have evidenced the obtaining of some good results concerning the photostabilization of the studied material with 2-[2,6-diphenyl-1,3,5-triazin-2-yl)-5-[hexyl)oxy]-phenol, commercially known as Tinuvin 1577 FF. The photostabilizer is a solid powder (molar mass 425,53), it is very efficient in the photostabilization of polymeric materials and has low toxicity. CH 2 5 H N N N Tinuvin 1577 FF The photostability of the stabilized crosslinked epoxy network was studied by exposure to filtered UV radiations generated by mercury lamps having wavelength maxima located at 254 and 365 nm. Irradiations were conducted in air on 25 μm thick rectangular sample films. The medium irradiance value measured at samples surface was 95 W m 2, while the medium exposure dose was 35 kjm 2 h 1. Photostabilizer concentration in the polymer bulk was 1%. The influence of the Tinuvin 1577 FF product on the photochemical stability of the epoxy network crosslinked with chemically modified vegetable oil was evaluated through thermal analysis methods (TG and DSC), surface colour variations, gloss measurements, spectral analyses (UV-Vis, FTIR), SEM micrographs. Variation of carbonyl index with irradiation time for the studied samples is given in Table 1. Table 1. Variation of carbonyl index with irradiation time (unpublished data) Irradiation time (h) Carbonyl index at 254 nm Carbonyl index at 365 nm unstabilized stabilized unstabilized stabilized 7,8 7,4 7,8 7,5 5 2,6 15,2 1,3 7,6 1 31,2 24,5 1,9 6, , ,9 6,6 2 33,2 31,4 1,9 6,6 25 4,8 29,6 9,5 7,1 From the table one may observe the influence of the photostabilizer on the increase in the photo-oxidative stability of the crosslinked network. At both 254 and 365 nm wavelengths it is clear that carbonyl indexes are much lower in the case of Tinuvin 1577 FF treated samples compared to the unstabilized ones. bjective 2. The thermal stability of the photostabilized multicomponent polymeric systems 2.1. Thermal characterization of the photostabilizers The thermal behavior of the Tinuvin 1577 FF photostabilizer was studied by using coupled thermal analysis techniques TG-DTA (simutaneous TGA-DTA thermal analysis device Jupiter 449 F1, NETZSCH Germany). Fig. 6 depicts the TG-DTA thermograms of Tinuvin 1577 FF sample, recorded in the temperature range 32-7 C, at a heating rate of 1 K min 1 and in inert atmosphere (N 2 ). By analyzing the thermogram of photostabilizer with 2-[2,6-diphenyl-1,3,5-triazin-2-yl)-5-[hexyl)oxy]-phenol, one may observe that the compound is thermally stable up to 338 C when the beginning of mass loss occurs. The photostabilizer thermally decomposes in a single stage with maximum mass loss rate around 452 C, as it may be deduced from the maximum peak temperature in the DTG curve.
6 Fig. 6 TG, DTA and DTG curves of Tinuvin 1577FF photostabilizer The thermal decomposition process ended at around 46 o C, with over 97,6% mass loss. The residue mass was 2,14% at 7 C. The DTA thermogram indicates two endothermic signals at 153,3 C ( H = 75,13 Jg -1 ) and 457 C ( H = 238,3 Jg -1 ) and an exothermal one at 546,53 C ( H = - 298,2 Jg -1 ). The first endothermic process depicts the melting process of the studied compound, whilst the other two accompany the thermal decomposition processes (unpublished data) The influence of photostabilizers on the thermal resistance of the studied materials The thermal stability of the epoxy resin based on bisphenol A and crosslinked with castor oil modified with maleic anhydride and stabilized with Tinuvin 1577 FF was study by thermogravimetric analysis (unpublished data). Approximately 1 mg of sample was weighed in alumina crucibles and heated in inert atmosphere, in the range 3-7 C at a rate of 1 K min -1. Mass variation as a function of temperature is given in Fig. 7. Fig. 7 Thermogram describing the thermal decomposition of epoxy resin based on bisphenol A and crosslinked with castor oil modified with maleic anhydride and stabilized with Tinuvin 1577 FF
7 Fig. 7. demonstrates that the studied sample thermally decomposes in a single stage in the temperature range 371,3 458,5 o C. Confirmation of this statement is given by the shape of the DTG curve which shows a single maximum at 425,7 o C. The starting thermal decomposition temperature of the studied sample (T onset ), defined as the temperature above which the mass losses become significant, is 371,3 o C. The final thermal decomposition temperature (T endset ), defined as the temperature after which the sample exhibits insignificant mass loss, is 458,6 o C. Another important parameter which characterizes thermal decomposition processes of polymers is represented by the temperature at which the mass loss rate is maximum (T m ). In the case of the studied sample, the T m value was found as 425,7 o C, value corresponding to the DTG curve peak. At this temperature the sample losses mass at a rate of -1.73% min -1. Residual mass at 7 o C was 7.47%, the sample thus losing 92.5% of its initial mass. As one may observe from the DTA curve shape, the entire process is an exothermic one. By comparing these data with the ones obtained for the unstabilized sample, one may conclude that the presence of the photostabilizer does not greatly influence the thermal stability of the studied polymer. bjective 3. Dissemination of the results Scientific papers: 7 1. Novel bio based flexible epoxy resin from diglycidyl ether of bisphenol A cured with castor oil maleate; D.Rosu, F.Mustata, N.Tudorachi, V.E. Musteata, L.Rosu, C. D.Varganici; RSC Advances, 5(57), (215); IF= 3,84; SI= 2, Epoxy and succinic anhydride functionalized soybean oil for wood protection against UV light action D.Rosu, R.Bodirlau, C. A.Teaca, L.Rosu, C. D.Varganici; J. Clean. Prod., (215); doi.org/1.116/j.jclepro ; IF= 3,844; SI= 1, Influence of poly(vinyl alcohol) on cellulose photochemical stability in cryogels during UV irradiation; C. D.Varganici, L.Rosu,.M.Mocanu (Paduraru), D. Rosu; J. Photochem. Photobiol. A: Chem., 297, 2 3 (215); IF= 2,495; SI=, n the thermal stability of some aromatic aliphatic polyimides; C. D.Varganici, D.Rosu, C.Barbu Mic, L.Rosu, D.Popovici, C.Hulubei, B.C. Simionescu; J. Anal. Appl. Pyrol., 113, (215); IF= 3,564; SI=1,75 5. Influence of two structural phases of Fe 3 4 and γ-fe 2 3 on the properties of polyimide/iron oxide composites; S. Ioan, S. Nica, V. Nica, V.C. Grigoras, C.-D. Varganici, D. Popovici, C. Hulubei; Polym. Int., 64, (215); IF= 2,49; SI= 1, TGA/DTA FTIR MS coupling as analytical tool for confirming inclusion complexes occurrence in supramolecular host guest architectures; C. D.Varganici, N.Marangoci, L.Rosu, C.Barbu Mic, D.Rosu, M.Pinteala, B.C. Simionescu; J. Anal. Appl. Pyrol., 115, (215); IF= 3,564; SI= 1,75 7. Thermal and hydrolytic stability of silver nanoparticle polyurethane biocomposites for medical applications; D.Macocinschi, D.Filip, M.F.Zaltariov, C. D.Varganici; Polym. Degrad. Stab., 131, (215); IF= 3,183; SI= 2,291 Book chapters: 2 1. D.Rosu, C. D.Varganici, L.Rosu,.M.Paduraru, Thermal degradation of thermosetting blends, in: Thermal Degradation of Polymer Blends, Composites and Nanocomposites, P.M. Visakh, Y. Arao (Editori), Editura Springer International, Elvetia, 215, pg. 17-5; ISBN ISBN (ebook). 2. C.-A.Teaca, R.Bodirlau, Multicomponent polymer composite/nanocomposite systems using polymer matrices from sustainable renewable sources, in: Eco-friendly Polymer Nanocomposites Processing and Properties; Thakur, Vijay Kumar, Thakur, Manju Kumari (Eds.), Editura Springer India, 215, pg , ISBN: Papers presented at scientific conferences: 11 (oral presentations: 2 and posters: 9) Seventh Cristofor I. Simionescu Symposium Frontiers in Macromolecular and Supramolecular Science, June 4 5, 215; Petru Poni Institute of Macromolecular Chemistry of Romanian Academy, Iasi 1. D.Rosu, F.Mustata, N.Tudorachi, C.-D.Varganici, L.Rosu; Bio based flexible networks from epoxy resin and castor oil maleate (Poster) 2. C.-A.Teaca, R.Bodirlau, D.Rosu, N. Tudorachi; Multi-component polymer systems based on biopolymers from renewable resources structure and properties (Poster) Romanian International Conference on Chemistry and Chemical Engineering, RICCCE 19, Sibiu, 2-5 September C.A. Teaca, R. Bodirlau, L. Rosu, C.-D. Varganici; FTIR spectral and colour changes of softwood coated with epoxy functionalized soybean oil and photo-degraded under UV light (Poster) 4. R. Bodirlau, C.A. Teaca, L. Rosu, E. Marlica, D. Rosu; Wood treatment with vegetable oils and its protective effect under environmental factors action (Poster) 5. D.Rosu, C.-D. Varganici, L. Rosu,.M. Mocanu (Paduraru); Poly(vinyl alcohol) cellulose cryogels. Photochemical behavior (Poster) 6. C.-D. Varganici, L. Rosu,.M. Paduraru (Mocanu), D. Rosu; Poly(vinyl alcohol) cellulose cryogels. Thermal behavior (Poster) 7. F. Mustata, E. Marlica, C.D. Varganici, V.E. Musteata; Thermal and electrical properties of DGEBA cured with maleinized castor oil (Poster) The 3nd CEEPN Workshop on Polymer Science, September 23-26, 215 Petru Poni Institute of Macromolecular Chemistry Iasi, Romania 8. C.-D. Varganici, D. Rosu, C. A. Teaca, L. Rosu, R. Bodirlau; Effect of epoxy and succinic anhydride functionalized soybean oil coating on wood resistance against photodegradation (ral presentation) 9. C.-A. Teaca, R. Bodirlau, L. Rosu, N. Tudorachi, D. Rosu; Multi-component polymer systems comprising different bio-based fillers (Poster)
8 "Progress in organic and polymer chemistry", The XXV th Symposium, September 215, Iasi 1. C. D Varganici, N. Marangoci, L. Rosu, C. Barbu Mic, D. Rosu, M. Pinteala, B.C. Simionescu; Studiul fenomenului de complexare in arhitecturi supramoleculare de tip gazda-oaspete prin TGA/DTA FTIR MS (ral presentation) 11. C.-D. Varganici, D. Rosu, C. Barbu Mic, L. Rosu, D. Popovici, C. Hulubei, B. C. Simionescu; Studiul comportamentului termic al poliimidelor semi-aromatice (Poster) 3.3. Ensure resources. Elaboration of the report stage. The involved research team in the project realized the following activities: - Monthly work sessions with team members; - Counseling activities for postdoctoral students by senior researchers; - rganizing panels of senior scientific team problem solving; - Elaboration and submitting articles for publication in ISI journals; - Establishing and procurement of the necessary materials for the development research program; - Human resources, financial and material planning for the next stage; - Acquisition activity planning, preparing documentation for procurement; - Tracking the supply flow and the use of funds; - Preparing stage report 215 (scientific, financial) In order to develop and implement management structure, team members met monthly and established detailed activity plans. It was followed effective and efficient communication of administrative, technical and financial research both within the team, and with the contracting authority. The entire research team was involved in drafting the report stage. It was compiled the file necessary to achieve independent financial audit in 215. The research team met its objectives with a total degree of achievement. Project director, Dr. Dan Rosu
The activities undertaken in the proposed objectives were finalized and are summarized in this present report.
Scientific Report Regarding the project implementation in the period January December 2014 Project title: Advanced researches related to the behavior of multicomponent polymer systems under simulated environmental
More informationScientific report. Figure 1. The photo-oxidative degradation mechanism of polymers
Scientific report Regarding the project implementation in the period October December 0 Project title: Advanced researches related to the behavior of multicomponent polymer systems under simulated environmental
More informationMALEIC ANHYDRIDE TREATMENT OF SOFTWOOD EFFECT ON WOOD STRUCTURE AND PROPERTIES
CELLULOSE CHEMISTRY AND TECHNOLOGY MALEIC ANHYDRIDE TREATMENT OF SOFTWOOD EFFECT ON WOOD STRUCTURE AND PROPERTIES CARMEN-ALICE TEACĂ, RUXANDA BODÎRLĂU and IULIANA SPIRIDON Petru Poni Institute of Macromolecular
More informationAdvanced Structured Materials
Advanced Structured Materials Volume 26 Series editors Andreas Öchsner, Southport Queensland, Australia Lucas F.M. da Silva, Porto, Portugal Holm Altenbach, Magdeburg, Germany More information about this
More informationCHAPTER 7 SUMMARY OF THE PRESENT WORK AND SUGGESTIONS FOR FUTURE WORK
161 CHAPTER 7 SUMMARY OF THE PRESENT WORK AND SUGGESTIONS FOR FUTURE WORK 7.1 SUMMARY OF THE PRESENT WORK Nonlinear optical materials are required in a wide range of important applications, such as optical
More informationPhilip Evans Wood Surface Science Laboratory University of British Columbia Vancouver, Canada
Philip Evans Wood Surface Science Laboratory University of British Columbia Vancouver, Canada 1. Surface science 2. FTIR & photo-degradation 3. FTIR & phot0-protection 4. Profilometry & plasma etching
More informationA Technical Whitepaper Polymer Technology in the Coating Industry. By Donald J. Keehan Advanced Polymer Coatings Avon, Ohio, USA
A Technical Whitepaper Polymer Technology in the Coating Industry By Donald J. Keehan Advanced Polymer Coatings Avon, Ohio, USA INTRODUCTION Polymer Technology in the Coating Industry To properly understand
More informationEffect of ultraviolet and x-ray radiation on optical properties of epoxy polymers dyed with organic phosphors
Effect of ultraviolet and x-ray radiation on optical properties of epoxy polymers dyed with organic phosphors V CH Laurinas 1, S S Kasymov 1, V M Yurov 1, E N Eremin 2 and M V Vedyashkin 3 1 E.A. Buketov
More informationTHERMAL AND ACTIVATION ENERGY OF RENEWABLE POLYMER AFTER UV IRRADIATION
THERMAL AND ACTIVATION ENERGY OF RENEWABLE POLYMER AFTER UV IRRADIATION Nik Normunira Mat Hassan and Anika Zafiah M. Rus Sustainable Polymer Engineering, Advanced Manufacturing and Material Center (AMMC),
More informationSupporting Information
Supporting Information 1. Microcapsules characterization 1.1. Thermogravimetric analysis (TGA) Thermal degradation in air and nitrogen of the synthesized microcapsules is shown in figure S1. 100 Weight
More informationChapter 2: Scope and Objectives
Chapter 2: Scope and Objectives 2.1 Introduction Now-a-days the production of polymers and plastics is increasing. Nylon 66 is a widely used yarn as well as engineering resin. Moreover, it is used in outdoor
More informationDEVELOPMENT OF A NOVEL COATING SYSTEM USING PHOTO-LATENT BASE TECHNOLOGY
DEVELOPMENT OF A NOVEL COATING SYSTEM USING PHOTO-LATENT BASE TECHNOLOGY Himanshu Manchanda and Vijay Mannari, PhD Coatings Research Institute, Eastern Michigan University, Ypsilanti, MI GOALS AND OBJECTIVES
More informationON THE THERMAL STABILITY OF FLAX FABRICS GRAFTED WITH MONOCHLOROTRIAZINYL-β-CYCLODEXTRIN AND TREATED WITH CINNAMIC DERIVATIVES
CELLULOSE CHEMISTRY AD TECHOLOGY O THE THERMAL STABILITY OF FLAX FABRICS GRAFTED WITH MOOCHLOROTRIAZIYL-β-CYCLODEXTRI AD TREATED WITH CIAMIC DERIVATIVES AA-MARIA GRIGORIU, COSTATI LUCA, GABRIELA LISA and
More information5.2 Photodegradation and stabilization of polymers
5.2 Photodegradation and stabilization of polymers Photodegradation of polymers b) 2 2 2 2 2 2 2 2 2 2 2 2 3 Exposure to sunlight and some artificial lights can have adverse effects on the useful life
More informationOXYGEN INHIBITION AND COATING THICKNESS EFFECTS ON UV RADIATION CURING OF WEATHERFAST CLEARCOATS STUDIED BY PHOTO-DSC
Journal of Thermal Analysis and Calorimetry, Vol. 75 (2004) 507 512 OXYGEN INHIBITION AND COATING THICKNESS EFFECTS ON UV RADIATION CURING OF WEATHERFAST CLEARCOATS STUDIED BY PHOTO-DSC Carmen Silvia Bentivoglio
More informationIRRADIATION EFFECTS ON POLY (VINYL CHLORIDE)
IRRADIATION EFFECTS ON POLY (VINYL CHLORIDE) L.COSTA, V. BRUNELLA, P. BRACCO Dipartimento di Chimica IFM, Università di Torino, Italy E-mail: brunella@ch.unito.it We have studied the electron beam effects
More informationflame retardant vinyl ester resin
Abstract Research Journal of Material Sciences ISSN 30 6055 Vol. 5(), 7-, February (07) Studies on flame retardant vinyl ester resin Patel R.H. * and Sevkani V.R. Department of Materials Science, Sardar
More informationSupporting Information
Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is The Royal Society of Chemistry 2017 Supporting Information A Facile Immersion-Curing Approach to Surface-Tailored
More informationPhotoinitiation, Photopolymerization, and Photocuring
Jean-Pierre Fouassier Photoinitiation, Photopolymerization, and Photocuring Fundamentals and Applications Hanser Publishers, Munich Vienna New York Hanser/Gardner Publications, Inc., Cincinnati Contents
More informationLightly cured. Seite/Page: 22
Lightly cured UV powder coatings based on unsaturated allylic polyesters. Dominique Burget, Mircea Manea, Stavros Apostolatos, Carole Mallein, Francoise Mauguiere-Guyonnet. Allylic-terminated unsaturated
More informationMultiple mechanisms can attack polymer chains here s what can go wrong. By Jeffrey Jansen the Madison group, Madison, Wisconsin, Usa
CONSULTANT S CORNER Plastic Failure Through Molecular Degradation Multiple mechanisms can attack polymer chains here s what can go wrong By Jeffrey Jansen the Madison group, Madison, Wisconsin, Usa [Note:
More informationWeathering of Artificial Grass Yarn CEN TC 217 WG 11, 18/10/2016 Daniel Müller (BASF) & Jeroen Wassenaar (TOTAL)
Weathering of Artificial Grass Yarn CEN TC 217 WG 11, 18/10/2016 Daniel Müller (BASF) & Jeroen Wassenaar (TOTAL) Why doing Artificial Weathering? Simulation of the photooxidative behavior of polymers Purpose:
More information5. Photochemistry of polymers
5. Photochemistry of polymers 5.1 Photopolymerization and cross-linking Photopolymerization The fundamental principle of photopolymerization is based on the photoinduced production of a reactive species,
More informationTRANSPARENT LAYERS OF AZO CONJUGATED POLYMERS: PREPARATION AND OPTO ELECTRICAL PROPERTIES
Journal of Optoelectronics and Advanced Materials Vol., No.,, p. - Section : Organic materials TRANSPARENT LAYERS OF AZO CONJUGATED POLYMERS: PREPARATION AND OPTO ELECTRICAL PROPERTIES "Petru Poni" Institute
More informationPhotostabilization of an epoxy resin by forming interpenetrating polymer networks with bisphenol-a diacrylate
Polymer Degradation and Stability 66 (1999) 343±347 Photostabilization of an epoxy resin by forming interpenetrating polymer networks with bisphenol-a diacrylate Mu-Shih Lin*, Ming-Wei Wang, Lon-An Cheng
More informationThermal Methods of Analysis
Thermal Methods of Analysis Calorie-something we know What is calorie? Can you see or touch a calorie? How is it measured? Working out in gym Change in weight Loss of calories-burning of fat? (10 km=500calories/9cal
More informationNutshells of Thermal Analysis. Heat it up! Burn it! Thermal Analysis
Nutshells of Thermal Analysis Heat it up! Burn it! 1 Thermal Analysis Thermal Analaysis (TA) Techniques Abbreviations Full Names Measure DSC Differential Scanning Calorimetry Heat difference DMA Dynamic
More informationAnalyzing & Testing. Photocalorimetry Photo-DSC. Method, Technique, Applications. Photo-DSC 204 F1. Leading Thermal Analysis
Analyzing & Testing Photocalorimetry Photo-DSC Method, Technique, Applications Photo-DSC 204 F1 Leading Thermal Analysis Photo-DSC 204 F1 Phoenix Method and Technique Advantages of Photocalorimetry Besides
More informationThermal degradation kinetics of Arylamine-based Polybenzoxazines
U Science Journal 9; 6(S): 3-3 Thermal degradation kinetics of Arylamine-based Polybenzoxazines Sunan Tiptipakorn *, Sarawut Rimdusit, Phiriyatorn Suwanmala 3 and Kasinee Hemvichian 3 Department of Chemistry,
More informationThermal and UV-curing Behavior of Inks, Adhesives, and Coatings by Photo-, In-situ DEA and DMA.
Thermal and UV-curing Behavior of Inks, Adhesives, and Coatings by Photo-, In-situ DEA and DMA. Dr. Gilles Widawski, Netzsch Instruments North America, Burlington, MA, USA Dr. Stephan Knappe, NETZSCH-Gerätebau
More informationGestão e Produção Sustentável. Durability Electromagnetic radiation. ENG K49 Materiais de origem vegetal aplicados na construção
Gestão e Produção Sustentável Durability Electromagnetic radiation ENG K49 Materiais de origem vegetal aplicados na construção Ricardo Fernandes Carvalho Electromagnetic radiation spectral band Microwaves
More informationThermal Properties Of Epoxy Based Adhesive Reinforced With
Thermal Properties Of Epoxy Based Adhesive Reinforced With We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer,
More informationLuminescent Plates Doped with Stilbene 420 Dye for Enhanced Silicon Solar Cell Performance: Down-Conversion
Iraqi Journal of Applied Physics Suma H. Al Shaikh Hussin Department of Physics, College of Science for Women, University of Baghdad, Baghdad, Iraq Luminescent Plates Doped with Stilbene 420 Dye for Enhanced
More informationAPPLICATIONS OF THERMAL ANALYSIS IN POLYMER AND COMPOSITES CHARACTERIZATION. Wei Xie TA Instruments
APPLICATIONS OF THERMAL ANALYSIS IN POLYMER AND COMPOSITES CHARACTERIZATION Wei Xie TA Instruments Abstract Thermal Analysis is the generic name for a series of measurement techniques traditionally used
More informationPreparation and Characterization of Hydrogels
Chapter 2 Preparation and Characterization of Hydrogels 2.1 Materials and Methods 2.1.1 Materials 2-Acrylamido-2-methylpropane sulfonic acid (AMPS) was obtained from Vinati Organic Ltd. Acrylamide (AM),
More informationDAMPING PROPERTIES OF SOME EPOXY RESIN - LIQUID CRYSTALLINE DYESTUFF COMPOSITES
U.P.B. Sci. Bull., Series A, Vol. 76, Iss. 1, 2014 ISSN 1223-7027 DAMPING PROPERTIES OF SOME EPOXY RESIN - LIQUID CRYSTALLINE DYESTUFF COMPOSITES Valentin RADITOIU 1, Raluca GABOR 2, Cristian-Andi NICOLAE
More informationPolymer Systems and Film Formation Mechanisms in High Solids, Powder, and UV Cure Systems
Polymer Systems and Film Formation Mechanisms in High Solids, Powder, and UV Cure Systems J. Baghdachi, Ph.D. Coatings Research Institute Eastern Michigan University (734) 487-3192 Freshpaint@aol.com jamil.baghdachi@emich.edu
More informationAustralian Journal of Basic and Applied Sciences. Characteristic of Photocurable Organic/Inorganic Hybrids Utilizing Acid Proliferation Reactions
AENSI Journals Australian Journal of asic and Applied Sciences ISSN:1991-8178 Journal home page: www.ajbasweb.com Characteristic of Photocurable Organic/Inorganic Hybrids Utilizing Acid Proliferation Reactions
More informationIntroduction to the Basics of UV/EB Chemistry and Formulations
Introduction to the Basics of UV/EB Chemistry and Formulations SUNY ESF Radiation Curing Program RadTech NA Dr. Mike J. Idacavage Colorado Photopolymer Solutions September 9, 2015 Agenda Introduction to
More informationRadical Initiation 2017/2/ ) Thermal Decomposition of Initiators
adical Initiation Production of radicals (from initiator) to initiate chain polymerization. A variety of initiator systems can be used to bring about the radical polymerization. 1) Thermal Decomposition
More informationPoly(phenyl acrylate) and Poly(p-methylphenyl acrylate) as photostabilizers II. Protection of PET against photo-oxidation
Polymer Degradation and Stability 83 (2004) 435 440 www.elsevier.com/locate/polydegstab Poly(phenyl acrylate) and Poly(p-methylphenyl acrylate) as photostabilizers II. Protection of PET against photo-oxidation
More informationDevelopment of Photosensitive Polyimides for LCD with High Aperture Ratio. May 24, 2004
Development of Photosensitive Polyimides for LCD with High Aperture Ratio May 24, 2004 utline Why is polymer dielectric required for TFT LCD? Requirements of the polymer dielectrics What is polyimide?
More informationGamma Radiation Effects on Benzoxazine Monomer: Curing and Thermal Properties
2011 International Conference on Chemistry and Chemical Process IPCBEE vol.10 (2011) (2011) IACSIT Press, Singapore Gamma Radiation Effects on Benzoxazine Monomer: Curing and Thermal Properties Sunan Tiptipakorn
More informationFACULTY PROFILE. Five keywords reflecting areas of Scholastic/Research activities:
Name: Dr. (Miss) Rasmika H. Patel FACULTY PROFILE Contact Address: Department of Materials Science Sardar Patel University, Vallabh Vidyanagar-388 120 Anand, Gujarat, India. Phone No.: 02692 226854 Mob.
More informationSimultaneous Thermal Analyzer (DTA/TGA)
Simultaneous Thermal Analyzer (DTA/TGA) Common term Thermal analysis: A technique of measuring the changes of physical properties of substances with program controlling temperature. All kinds of thermal
More informationJ. Photopolym. Sci. Technol., Vol. 22, No. 5, Fig. 1. Orthogonal solvents to conventional process media.
originates from the limited number of options regarding orthogonal solvents, i.e. solvents that do not dissolve or adversely damage a pre-deposited organic materials layer. The simplest strategy to achieve
More informationScientific report STSM COST FP1006
Scientific report STSM COST FP1006 Host person: Marion Noel Host Institution:Bern University of Applied Sciences Architecture, Wood and Civil Engineering, Biel/Bienne, Switzerland Period: from 11 th of
More informationThermal Methods of Analysis Theory, General Techniques and Applications. Prof. Tarek A. Fayed
Thermal Methods of Analysis Theory, General Techniques and Applications Prof. Tarek A. Fayed 1- General introduction and theory: Thermal analysis (TA) is a group of physical techniques in which the chemical
More informationSynthesis and Characterisation of Novel Crosslinked Biopolyurethane from Soyabean oil as ecofriendly Biodegradable Material
Synthesis and Characterisation of Novel Crosslinked Biopolyurethane from Soyabean oil as ecofriendly Biodegradable Material 1 M.L.Ginju, 2 Dr. S. Begila David 1 Research Scholar, Department of Chemistry
More informationA Glossary of Terms Used in the Adhesives, Coatings and Elastomers (ACE) Sector
A Glossary of Terms Used in the Adhesives, Coatings and Elastomers (ACE) Sector Abrasion resistance The ability of the coating membrane to resist mechanical action such as foot traffic and particles, which
More informationChapter 4. Results and Discussion. 4.1 Monomer Syntheses
Chapter 4 Results and Discussion 4.1 Monomer Syntheses The syntheses of a family of novel, carbazole based methacrylate, dimethacrylate, and acrylate monomers, and subsequent purifications, were successful.
More informationIN VITRO DEGRADATION AND EROSION OF DEGRADABLE LACTATE SEGMENTED POLYURETHANES
Journal of Optoelectronics and Advanced Materials Vol. 7, No. 6, December 2005, p. 2803-2808 IN VITRO DEGRADATION AND EROSION OF DEGRADABLE LACTATE SEGMENTED POLYURETHANES V. Melnig *, L. Obreja, A. Garlea
More informationCuring Properties of Cycloaliphatic Epoxy Derivatives
Curing Properties of Cycloaliphatic Epoxy Derivatives Hiroshi Sasaki Toagosei Co. Ltd. Nagoya, Japan Introduction UV-cationic-curing, based on the photo-generation of acid and consecutive cationic polymerization,
More informationConclusion and Future Work
Chapter 7 7. Chapter 7 and Future Work Chapter 7 Abstract This chapter gives the details of correlations of the spectroscopic investigation results with those available from other studies and also summarizes
More informationIon Beam Induced Luminescence (IBIL) for scintillator analysis
Ion Beam Induced Luminescence (IBIL) for scintillator analysis Alberto Quaranta Università di Trento Dipartimento dei Materiali e delle Tecnologie Industriali (DIMTI) Laboratori Nazionali di Legnaro -
More informationSupporting Information
Supporting Information Han et al. 10.1073/pnas.1212690110 SI Materials and Methods Aging of Soot by O 3. Soot particles were deposited on the ZnSe crystal. The sample in the in situ reactor was purged
More informationEnhanced Thermal Conductivity for Poly(vinylidene fluoride) Composites with Nano-carbon Fillers
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2016 SUPPORTING INFORMATION Enhanced Thermal Conductivity for Poly(vinylidene fluoride) Composites
More informationCHEM*3440. Thermal Methods. Thermogravimetry. Instrumental Components. Chemical Instrumentation. Thermal Analysis. Topic 14
Thermal Methods We will examine three thermal analytical techniques: Thermogravimetric Analysis (TGA) CHEM*3440 Chemical Instrumentation Topic 14 Thermal Analysis Differential Thermal Analysis (DTA) Differential
More informationStudies on Furan Polymer Concrete
Studies on Furan Polymer Concrete Rajesh Katiyar 1, Shobhit Shukla 2 1Associate Professor, Department of Chemical engineering, H.B.T.U., Kanpur-208002, India 2Research Scholar, Department of Chemical engineering
More informationEpoxy resin inspired reconfigurable supramolecular networks
Supporting information for: Epoxy resin inspired reconfigurable supramolecular networks Diederik W. R. Balkenende, 1 Rebecca A. Olson, 2 Sandor Balog, 1 Christoph Weder 1 and Lucas Montero de Espinosa
More informationLiquid Polybutadienes and Derivatives
Liquid Polybutadienes and Derivatives Coatings & Colorants Product Range Our polyoils and derivatives are stereospecific, lowviscosity and unsaponifiable liquid polybutadienes having a high 1.4-cis double
More informationOrganogels eco-friendly natural smart systems for cosmetic and dermocosmetic
rganogels eco-friendly natural smart systems for cosmetic and dermocosmetic use Plamen KIRILV Plamen Kirilov, Cosmétopée Thaiti 24 Novembre 2016 Puna auia HSA organogels preparation and physico-chemical
More informationChemistry Instrumental Analysis Lecture 3. Chem 4631
Chemistry 4631 Instrumental Analysis Lecture 3 Quantum Transitions The energy of a photon can also be transferred to an elementary particle by adsorption if the energy of the photon exactly matches the
More informationAPPLICATION OF POLYMERIC NANO COMPOSITES AT LOW EARTH ORBIT AND GEOSYNCHRONOUS EARTH ORBIT
APPLICATION OF POLYMERIC NANO COMPOSITES AT LOW EARTH ORBIT AND GEOSYNCHRONOUS EARTH ORBIT S. Bhowmik, R. Benedictus, H. M. S. Iqbal and M. I. Faraz Faculty of Aerospace Engineering, Delft University of
More informationSupplementary information. Reduced graphene oxide derived from used cell graphite, and its green fabrication as eco-friendly supercapacitor
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2014 Supplementary information Reduced graphene oxide derived from used cell graphite, and its green
More informationABSTRACT. USDA FS Forest Products Laboratory, Madison WI ADVANCING RAMAN SPECTROSCOPY FOR LlGNlN APPLICATIONS
ADVANCING RAMAN SPECTROSCOPY FOR LlGNlN APPLICATIONS Umesh P Agarwal USDA FS Forest Products Laboratory, Madison WI E-mail:uagarwal@fs.fed.us ABSTRACT Over last 25 years, lignin applications of Raman spectroscopy
More informationSupplementary Figure S1. Verifying the CH 3 NH 3 PbI 3-x Cl x sensitized TiO 2 coating UV-vis spectrum of the solution obtained by dissolving the
Supplementary Figure S1. Verifying the CH 3 NH 3 PbI 3-x Cl x sensitized TiO 2 coating UV-vis spectrum of the solution obtained by dissolving the spiro-ometad from a perovskite-filled mesoporous TiO 2
More informationPeracetic Acid Bleaching CH CO H
Peracetic Acid Bleaching CH 3 CO 3 H Introduction of Bleaching Bleaching is a chemical decoloration and delignification process carried out on various types of pulp. Dli Delignification ifi i Removal of
More informationSupplementary Figures
Supplementary Figures I n t e g r a l 2. 0 1 3 9 2. 0 4 1 5 0. 0 4 4 2 1. 0 0 0 0 1. 0 0 3 2 4. 1 0 0 6 2. 9 8 6 5 1 0. 1 9 4 8. 5 8. 0 7. 5 7. 0 6. 5 6. 0 5. 5 5. 0 4. 5 4. 0 ( p p m ) 3. 5 3. 0 2. 5
More informationSUPPORTING INFORMATION. Self-healable and Ultra-hydrophobic Polyurethane-POSS Hybrids by Diels-Alder. Click Reaction; A New Class of Coating Material
SUPPORTING INFORMATION Self-healable and Ultra-hydrophobic Polyurethane-POSS Hybrids by Diels-Alder Click Reaction; A New Class of Coating Material Prasanta Kumar Behera, Prantik Mondal, Nikhil K. Singha*
More informationVolume # 7 Issue # 8 August 2015 Rs.5/- Volume # 7 Issue # 8 August-September 2015 INTERNATIONAL.
Rs.5/- Volume # 7 Issue # 8 August 2015 Rs.5/- Volume # 7 Issue # 8 August-September 2015 INTERNATIONAL www.eqmaglive.com www.eqmaglive.com Materials Matter For Reliable Performance And Power Output Of
More informationFibrillated Cellulose and Block Copolymers as a Modifiers of Unsaturated Polyester Nanocomposites
Fibrillated Cellulose and Block Copolymers as a Modifiers of Unsaturated Polyester Nanocomposites Daniel H. Builes, Hugo Hernández, Laida Cano, Agnieszka Tercjak Group Materials + Technologies Polymeric
More informationUV-POLYMERIZATION IN THE PRESENCE OF NANOFILLERS CHAP Introduction
UV-POLYMERIZATION IN THE PRESENCE OF NANOFILLERS 3.1 Introduction The first problem in preparing UV-cured composites is the filler transparency towards UV-light. Otherwise it will be a competition of the
More informationSupplementary Figure 1. Cross-section SEM image of the polymer scaffold perovskite film using MAI:PbI 2 =1:1 in DMF solvent on the FTO/glass
Supplementary Figure 1. Cross-section SEM image of the polymer scaffold perovskite film using MAI:PbI 2 =1:1 in DMF solvent on the FTO/glass substrate. Scale bar: 1 m. Supplementary Figure 2. Contact angle
More informationCHARACTERIZATION OF POLYTHIOPHENE FILMS OBTAINED IN ATMOSPHERIC PRESSURE PLASMA REACTORS
ALEXANDRU IOAN CUZA UNIVERSITY OF IASI FACULTY OF PHYSICS Iasi Plasma Advanced Research Center (IPARC) CHARACTERIZATION OF POLYTHIOPHENE FILMS OBTAINED IN ATMOSPHERIC PRESSURE PLASMA REACTORS - Thesis
More informationInfluence of a Stabilized Cap Layer on the Photodegradation of Coextruded High Density Polyethylene/Wood-Flour Composites
Influence of a Stabilized Cap Layer on the Photodegradation of Coextruded High Density Polyethylene/Wood-Flour Composites Shan Jin, 1 Nicole M. Stark, 2 Laurent M. Matuana 3 1 Department of Forestry, Michigan
More informationTHE USE OF ESTERIFIED LIGNIN FOR SYNTHESIS OF DURABLE COMPOSITES
THE USE OF ESTERIFIED LIGNIN FOR SYNTHESIS OF DURABLE COMPOSITES Olsson, S., 1 Östmark, E., 1,2, Ibach, R.E., 3 Clemons, C.M., 3 Segerholm, K.B., 1, 4 & Englund, F. 1 ABSTRACT Lignin is a natural polymer
More informationComparison of Different UV Light Sources in Radical Curing of PEGDA and PEGDA/HDDA Resins by Photo-DSC and Photo-DEA
Comparison of Different UV Light Sources in Radical Curing of PEGDA and PEGDA/HDDA Resins by Photo-DSC and Photo-DEA Dr. Pamela J. Shapiro NETZSCH Instruments North America, LLC Burlington, MA, USA Introduction
More informationInfrared Spectroscopy
Infrared Spectroscopy IR Spectroscopy Used to identify organic compounds IR spectroscopy provides a 100% identification if the spectrum is matched. If not, IR at least provides information about the types
More informationMORPHOLOGY AND THERMAL STUDIES OF NICKEL CARBONATE NANOPARTICLES
MORPHOLOGY AND THERMAL STUDIES OF NICKEL CARBONATE NANOPARTICLES R.Hepzi Pramila Devamani 1, M.Krishnaveni 2, J.Mercy Jeno Rose 3 1 Assistant Professor, 2,3 M.Sc Students, Post Graduate Department of Physics,
More informationDefense Technical Information Center Compilation Part Notice
UNCLASSIFIED Defense Technical Information Center Compilation Part Notice ADP013065 TITLE: Two-Dimensional Photonic Crystal Fabrication Using Fullerene Films DISTRIBUTION: Approved for public release,
More informationColorimetric Study on the Application of Some Fluorescent Naphthalimide Derivatives
22 The Open Textile Journal, 2010 3, 22-26 Open Access Colorimetric Study on the Application of Some Fluorescent Naphthalimide Derivatives P. Miladinova and T. Konstantinova * Organic Synthesis Department,
More informationON THE IMPORTANCE OF HYDROQUlNONE/ p -QUINONE REDOX SYSTEM IN THE PHOTOYELLOWING OF MECHANICAL PULPS
ON THE IMPORTANCE OF HYDROQUlNONE/ p -QUINONE REDOX SYSTEM IN THE PHOTOYELLOWING OF MECHANICAL PULPS Umesh P. Agarwal USDA Forest Service, Forest Products Laboratory One Gifford Pinchot Drive Madison,
More informationIntroduction ENERGY. Heat Electricity Electromagnetic irradiation (light)
Photochemistry Introduction ENERGY Heat Electricity Electromagnetic irradiation (light) Vision: Triggered by a photochemical reaction Is red in the dark? The answer must be NO - Since what we see as colour
More informationSupplementary Information for. Silver Nanoparticles Embedded Anti-microbial Paints Based on Vegetable Oil
Supplementary Information for Silver Nanoparticles Embedded Anti-microbial Paints Based on Vegetable Oil Ashavani Kumar #, Praveen Kumar Vemula #, Pulickel M. Ajayan, George John * Department of Chemistry,
More informationEffects of Multifunctional Monomers on the Properties of UV Cured Films
Effects of Multifunctional Monomers on the Properties of UV Cured Films Bentian Zhang, Lili Zhang, and Jianhua Liu/Nantong Fengtian Agent Factory Co., Ltd., 10, Xinjian West Road, Fengli Town, Rudong County,
More informationPhotochemical Degradation of Acetylated, Methylated, Phenylhydrazine-Modified, and ACC- Treated Wood*
Photochemical Degradation of Acetylated, Methylated, Phenylhydrazine-Modified, and ACC- Treated Wood* M. A. KALNINS, Forest Products Laboratory, Madison, Wisconsin 53705 Synopsis If wood under clear, ultraviolet-transparent
More informationNovel Photochemical/Thermal Dual-Cure initiating system for cationic polymerization of thick materials
Novel Photochemical/Thermal Dual-Cure initiating system for cationic polymerization of thick materials M. LECMPEE (1,2), X. ALLNAS* (1), D. MAECHAL (2), A. CIQUI (2) (1) Laboratory of Macromolecular Photochemistry
More informationEvolved gas analysis by simultaneous thermogravimetric differential thermal analysis-fourier transformation infrared spectroscopy (TG-DTA-FTIR)
Technical articles Evolved gas analysis by simultaneous thermogravimetric differential thermal analysis-fourier transformation infrared spectroscopy (TG-DTA-FTIR) Tadashi Arii* 1. Introduction Simultaneous
More informationRadiation Effects on Poly(propylene) (PP)/Ethylene Vinyl Acetate Copolymer (EVA) Blends
Effects on Poly(propylene) (PP)/Ethylene Vinyl Acetate Copolymer (EVA) Blends Siqin Dalai,* Chen Wenxiu Department of Chemistry, Beijing Normal University, Beijing 100875, China Received 22 March 2001;
More informationUnderstanding electron energy loss mechanisms in EUV resists using EELS and first-principles calculations
Understanding electron energy loss mechanisms in EUV resists using EELS and first-principles calculations Robert Bartynski Sylvie Rangan Department of Physics & Astronomy and Laboratory for Surface Modification
More informationATR-FTIR AND THERMAL BEHAVIOR STUDIES OF NEW HYDROGEL FORMULATIONS BASED ON HYDROXYPROPYL METHYLCELLULOSE/POLY(ACRILIC ACID) POLYMERIC BLENDS
ATR-FTIR AND THERMAL BEHAVIOR STUDIES OF NEW HYDROGEL FORMULATIONS BASED ON HYDROXYPROPYL METHYLCELLULOSE/POLY(ACRILIC ACID) POLYMERIC BLENDS MIRELA-FERNANDA ZALTARIOV, DANIELA FILIP, CRISTIAN-DRAGOS VARGANICI
More informationCharacterization. Chapter 3: Photo-oxidative degradation in Nylon 66 : Chemical. 3.1 Introduction
Chapter 3: Photo-oxidative degradation in Nylon 66 : Chemical Characterization 3.1 Introduction Aliphatic polyamides have got very good applications as engineering plastic as well as fiber material. During
More informationBONDING FIRE RETARDANTS TO WOOD. PART I. THERMAL BEHAVIOR OF CHEMICAL BONDING AGENTS
BONDING FIRE RETARDANTS TO WOOD. PART I. THERMAL BEHAVIOR OF CHEMICAL BONDING AGENTS Roger M. Rowell USDA, Forest Service, Forest Products Laboratory, Madison, WI 53705 Ronald A. Susott USDA, Forest Service
More informationThis is the published version Liu, Xin, Cheng, Tong, Parhizkar, Marzieh, Wang, Xungai and Lin, Tong 2010, Photochromic textiles from hybrid silica coating with improved photostability, Research journal
More informationThermoset Resins and Their Composites
ACCE 22, September 13-14, 14, 22 Bio-based Thermoset Resins and Their Composites M. Misra,, L. T. Drzal, A. K. Mohanty,, L. Belchler, G. Mehta,, J-P. J Latere Dwan sisa Michigan State University 21 Engineering
More informationATR-FTIR AND THERMAL BEHAVIOR STUDIES OF NEW HYDROGEL FORMULATIONS BASED ON HYDROXYPROPYL METHYLCELLULOSE/POLY(ACRILIC ACID) POLYMERIC BLENDS
CELLULOSE CHEMISTRY AND TECHNOLOGY ATR-FTIR AND THERMAL BEHAVIOR STUDIES OF NEW HYDROGEL FORMULATIONS BASED ON HYDROXYPROPYL METHYLCELLULOSE/POLY(ACRILIC ACID) POLYMERIC BLENDS MIRELA-FERNANDA ZALTARIOV,
More informationBasic Principles. Fundamental principles of UV reactive manufacturing processes
Basic Principles Fundamental principles of UV reactive manufacturing processes The Basics Fundamental principles of UV reactive manufacturing processes Chemical curing While the UV systems technology and
More informationWhite Paper Adhesives Sealants Tapes
Fundamental principles of UV reactive manufacturing processes Introduction While the UV systems technology and the appropriate chemistry have been developing continuously, the principle of irradiation
More informationCHARACTERIZATION OF WOODEN ARTEFACTS BY VIBRATIONAL SPECTROSCOPY
RER 8015 Using Nuclear Techniques for the Characterization and Preservation of Cultural Heritage in the European Region Regional Training Course on Demonstration of Techniques for Cultural Heritage Protection,
More information